I have just begun using flash catalyst. For some reason, the loading bar doesn't appear until moments before the content appears, leaving a large white area while loading. Here is the file. It isn't a large file, so people with high speed connections probably won't notice.
Some more details.
I used Dreamweaver to build the site. I inserted the flash file into the page using the SWF button under media in the insert bar. The expressInstall.swf and swfobject_modified.js files are present in the scripts folder.